Pump



'Feb."14, 192s 1,658,850

- T. H. MARS PUMP Filed Oct. 20. 1926 arranfged Re erence should now be made to the action tion line 1-1 of Figu I thereb Pltenletl Feb, 14,i19za rnolqs n. nae,- or

cnrcae irmmors, mm: ro amnion cones in conronarron or mom.

Amman ma met: so, use. lcrhl at. 14am.

7 This invention erally a pertains to umps and artic arly to a ouble acting orce pump or raising liquids.

The invention Purpomsto provide an im-. proved pump this character in which pressure and ,vacuum losses willv be reduced to a if not entirely overcome,-

y materially enhancing the efiiciency 4 thereof.

Another pu is to provide a simplified construction w ch lends itself to quantity production at a low cost.

' Other obi'ects, more specific, are to provide a nove form of piston actuating mechanism;- to provide an improved casing for the pump; and'to rovide a construction in which leakage of t e pumped liquid is prevented. a

Undoubtedly other objects will be ap "parent to those skilled in this art as the description of'the invention continues. y

Briefly, these desirable objects are at tained in a double ac reciprocatory, piston force pump by. providing anovel-c'asmg in which the improved pump {structure is in the most advantageous manner,

companying sheet of-drawings illustrating one practicable embodiment which this inventilxlm may; in-practice, and in h igure 1' isa. longitudinal, verticalfsecview oi the pump,,taken along the'secre 2, asview'ed in the" direction ofthe arrows; and

Figure 2 is a similar view. partly in section and at right angles to the view shown in Figure 1,;as seen al thesectionline of. 'of'the arrows.

In these drawings it be improved pump embodies a novel" made held togethe by bol 7 secu r ts minal e nds of these are formed with casmg up of two identical are com lemen portions forming nipples 8. whi h are Ft h readedto receive a nut 9 for :14. It. will be noted thatthe inner side of each head has formed therein an elongated '06 ton 13an sleeve 12.

1, looking in direction ther. These nuts 9 are provided with a 60 t readed bore, as shown, and these bores receive atone end an intake lead 10 and at the other end, a dischar lead 11.

Qentrally disposed on e inside of the casing sections are complementary portions 65 formmga sleeve 12 transversely arranged in the casing. This "sleeve extends almost the w dth of .the casing, but stops just short of the casing walls at its ends for a purpose presently to appear. This sleeve .12 carries v00 thereln for reciprocation a double actin lston 13 having a head at each end, whic eads are securely held together. by bolts dwell or cani track 15 for a purpose later to' appear. I Piston-rings 16 are provided to form at ht pressure seal bjetweeuthe pis Lookingat the casing (Figure 2)," it will be seen that the two complementarysections 5 and 6 are'iormed to provide nipples-17, each formed with a bore to receive a journal bushing 18, which.

"bushings serve as a journal for a shaft 19.- 1s The bushings 13 may beheld in lace b dust roof caps20,aswillbe une It tends transversely throu be observed that the shaft 19 exthe piston '13 at a right angle. Dne an I of the shaft pro so .trudes through the casing, as shown, and is squared, detachably' toreceive a hand crank 21. If desired, packing .rmgs 22 may be.

Rlaakced around the shaft 19 to insure against nals of the shafti but in practice these washerswillprobabybeunn ,as 'w ll. later be understood. a

' The shaft 19 integrally has formed therevisccu on, eentrally-in'the casing, an eccentric 28' which carries a ball 24, hose inner race is ion. the eccentric and whose outer racerides in the dwell's ili formed on Y the. inner face'oflthe'headsof the piston. 1 I

The central disposition of the sleeve112 in OI leaves an intake chamber at th. V.

6 casingandanexhaustchl one end 0 the ,nflphomingthe 1 gm a ber ecu the'other end. opp s e y structure again m or pressure losses adjacent the jourposed in the intake chamber are blocks 27 in which are formed ports 28, each provided with a spring pressed poppet valve 29.

These valves are intake valves. Similarly, at the other end of the casing are blocks 30, ports 31, and spring pressed poppet valves 32, which latter are exhaust valves.

In operation, it can now be seen that either rotation or rocking of the shaft 19 by means of the hand crank 21' will cause the piston 13 to he reciprocated in the sleeve 8 12, by means of the eccentric drive described.

As viewed in Figure 1, movement of the piston to the'rightwill cause a vacuum at the left of the casing, which will suck open the left hand intake valve 29, causing liquid to bedrawn up into the chamber 27. At

this step, theright hand intake valve 29 will be kept closed, as is apparent. A return movement of the piston to the leftwill new force the liquid upwardly around the lefthand end of the piston and out the lefthand discharge valve 32, because this pressure seatsthe left handvalve 29, while at the same time it will create a vacuum which will suck open the right hand intake valve 29 to draw up more liquid. Thus, the alternate pressures and vacuums will control the valves alternately, and force a constant stream oi liquid out through the exhaust lead 11, as will-be understood. 4

It is veryimportant to observe that the path of the liquid through the pump casing is alternately around the head ends of the piston, which paths are as remotely as possible spaced awayirom the joint between the two casing sections 5 and 6, and the journals 18 for the shaft 19. Thus, the liquid vent the mg parts.

never streams pastthe joints or journals in the body of the casing, thereby preventing leakage The piston rings 16 similarly preliquid from getting into the driv ,Furthermore, the pressure and vacuum strokes of the piston 19 are against the faces of the casing sections, also as remotely as possiblespaced away from the joints between the sections and the journals of the shaft, which construction etl'ectually prevents pressure and vacuum losses, therebyinaterially increasing the ellicieney of the Another important feature in the eficient operation of this" pump is the dwell formation 15 oi the piston in which the bearing 24 rides up and down, because of the eccentrio drive The dwell, being like .a cam appreciated -:that all of the objects heretofore expressed are accomplished. It is to' be understood that the present disclosure is track, causesthe bearing to function like a,

tractor in positively moving the. piston, with :l'rictional resistance cut to a um,

From the above disclosure it can now be purely illustrativevand may assume other forms lie-practice, and that itis the intenmacaw tion to cover all changes and modifications which do not depart from the spirit and scope of this invention as is indicated in the subjoined claims.

What I claim is:-

1. A pump comprising a casing provided with inlet and outlet leads, said casing also having a sleeve arranged therein, a piston in the sleeve, means for reciprocating the piston comprising a rotatable shaft and an eccentric, said shaft passing at a right angle through said piston and an anti-friction hearing between the eccentric and piston.

2. A pump comprising a casing provided with inlet and outlet leads, said casin also having a sleeve arranged therein, a double headed piston'in the sleeve, a shaft extending through the piston between its heads, an eccentric formed on the shaft for recipro eating the piston, and an anti-friction bearing between the eccentric and heads of the piston.

3. A pump comprising a casing provided with inlet and outlet leads, said casing also having a sleeve arran ed therein, a double headed piston in the sleeve, a shaft extending through the piston between its heads, a cam track on the inner face of each piston head, an eccentric formed on the shaft, and an anti-friction bearing movable in the cam tracks between the piston heads and eccentrio.

4. A pump comprising a casing provided with inlet and outlet leads, said casing also having a sleeve formed therein, a double headed piston in the sleeve, a shaft extending transversely at a right angle through the piston between its heads, a cam track on the inner-lace of each piston head, an eccentric on the shaft between the heads, and an antifriction bearing disposed between the eccentric andriding in the tracks to exert a tractive effort for positively reciprocating said piston in the sleeve. 7

5. A pumpromprisinga pair of complementary casing sections, each section having a centrally arranged sleeve portion and end nipple portions, means for securing the sections together, ,means locking the nipple portions together, exhaust and intake leads fitted into the nipple locking means, and means in the sleeve for forcing liquid through the casing in a path remotefrom the joint between the casing sections.

6. A pump comprising a. casing provided with inlet and outlet leads, said casin also havgkg a sleeve arranged therein, a ouble hea piston in the sleeve, ashaft passed right angularly through the sleeve and piston, said shaft being journaled for rotation in the casing, an eccentric wheel integrally formedon said shaft and located between the heads of the piston, a bearin around said eccentric wheel, and means in lihe heads forreceivmg sald bearing to guide the same.

- 7. A pump comprising a pair of compleportions together, exhandz and intake leads mentary casmg'seetions, each section hev mounted in said nuts, and I. piston operable a centrally arranged sleeve portion and en in the sleeve for forcing liquid through the 19 nipple portions extending right angularly casing. r

5 to the said sleeve portion, means for secnr- Chicago, Illinois, October 16th, 1926.

ing the body of the sections together to form a'closed casing, nuts for locking the nipple THOMAS H. MARS. 

